Clamp



(N0 Model.)

@.COHALAN.

CLAMP.

Patented Mar. 29, 1898.

ATnNr jFICE.

CORNELIUS COHALAN, OF JERSEY CITY, NEW JERSEY.

CLAMP.4

SPECIFICATION forming part of Letters Patent No. 601,370, vdated March 29, 41898. Application filed NovemhorZZ, 1897. Serial No. 659,421. (Nomodel.)

To all whom t may concern:

Be it known that I, CORNELIUS COHALAN, a citizen of the United States, residing at Jersey City, in the county of Hudson, State of New Jersey, have invented certain new and useful Improvements in Clamps, of which the following is a description, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The present invention relates to improvements in clamps, and more particularly to clamps designed to hold piles, logs, dac., my obj ect being to provide a structure which can be readily attached and by which the chain or other binding member can be tightly drawn about the piles, zc., and when so drawn is firmly held in position.

A further object is to enable the chain to be tightened at will.

Generally speaking, the present device comprises a foot-block, a screw'journaled in the same, a head-block upon said screw movable along the same, means upon said headblock for holding one end of a chain', means upon said head-block for engaging the chain intermediate its ends, whereby when the chain is passed around a bundle of piles and engaged bythe head-block it can be tightened by turning the screw and causing the head-block to move away from the foot-block, and a holding member upon the foot-block, through which the chain passes after surrounding the objects to be bound, said hold'- ing member being so constructed that the chain passes freely through it during the tightening action of the screw; but said chain ,Y is normally held securely against backward movement.

The invention consists in the variousmatters hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a perspective of the present clamp applied to a bundle of piles. on the line 2 2 of Fig. l. Fig. 3 is a crosssectional elevation of one of the holding members. Fig. 4 is a detail sectional-elevation showing the manner in which the screw is seated in the foot-block, and Fig. 5 is a view of the staple.

Referring now more particularly to the drawings, A represents the foot-block, which, as shown, is a stout piece of metal having a Fig. 2 is a top plan viewA recess a therein to receive the lower end of the screw B. A pintle b upon thebottom of said screw projects through the opening a', extending through the foot-block-and leading from the'screw-seat, the under face of the foot-block being countersunk, as at a2, about the said opening d. This structure permits the lower end of the pintle b t0 be struck Iup' or headed, as shown, and thus hold the screw and the block together, while at the same time no portion of the pintle projects beyond the under face of the block to interfere with the rotation of the screw.

A head-block C, having an internallyto engage in any convenientlink of the chain;

By this structure the foot-block is placed against one of a bundle of piles, the chain passed around said piles, and one of its links engaged by one of the hooks c2. Rotation of the screw then causes the head-block to travel away from the foot-block, and the piles are consequently drawn together.

It is frequently found necessary to take up more slack than can be done by running the head-block a single time along the screw. There is therefore provided a locking member for holding the chain at thepoint to which it has been drawn, while the head-block is run down until one of its hooks engages a new link, when the tightening operation can be repeated. This locking member is shown at E. A frame c, having an elongated opening e therethrough, has pivoted upon its upper face a plate or jaw e2, said plate being pivoted at one edge of the opening c and eX- tending almost the entire distance acrossl the saine. This frame has ears e3, which it upon opposite sides of the lug a3, projecting from the foot-block. A bolt 0c, passing through the earsand lugs, serves to pivot the lookin g member E to the foot-block. The chain is passed through the opening c before it is ,engaged by a hook c2, and during the forward passage of the chain, due to the outward movement of the head-block, the pivoted jaw rides freely.

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As soon, however, as the chain tends to move backwardly it is clamped and held between the jaw and the opposite-lying face of 'the opening e'. Thus the hook c2 can be disengaged, a new link caught by said hook, and the tightening action repeated until the piles are held as closely as may be desired; By pivoting the member E to the foot-block said member is permitted to swing backwardly upon the bundle of piles, and the strain of the chain is thus taken off the connection between the said member and the foot-block.

There is preferably a. holding member pivoted to each side of the foot-block, and the openings e in these members are long enough to hold two or more chains at the same time. Any suitable means may be provided for rotating the screw B, and, as here shown, the said screw has an opening b2 at its upper end designed to receive a rod b3. l have herein described the binding member D as a chain composed of links; but it is manifest that other suitable members may be substituted for the same, said substituted members being provided with suitable parts corresponding to links to be engaged by the hooks c2.

From the foregoin git will be seen that while the present clamp is composed of but yfew parts simple in their construction a powerful clamping action is secured and the binding member can be drawn as tightly as may be desired, after which it is firmly held in position. Manifest] y after the chain has been drawn sufficiently taut the pivoted jaw upon the holding member aids in preventing backward movement of said chain and therefore relieves the threads of the screw of a portion of the strain exerted upon them.

Having thus described my invention, what I claim as new, and desire to secure Vby Letters Patent, is

l. A clamp comprising a foot-block, a guide upon the same, a head-'block movable along said guide away from the foot-block, members upon the head-block for engaging two points of a binding member, and means for moving the head-block along the guide away from the foot-block; substantially as described.

2. In a clamp or the like, a foot-block, a screw seated in said foot-block, and a pintle upon said screw passing through the block, the foot-block being counter-sunk about the opening through which the pintle passes, whereby said pintle can be headed and the head will not project beyond the outer surface of the foot-block; substantially as described.

3. A clamp comprising a foot-block, means upon said foot-block for engaging and tightening a binding member, a frame pivoted to said foot-block, and means upon said frame for engaging and holding the binding member against backward movement; substantially as described.

4. A clamp comprising a foot-block, meansupon said foot-block for engaging and tightening a binding member, a frame pivoted to the foot-block through which the binding member passes before being engaged by' the tightening mechanism, and a jaw pivoted upon the frame, and having its backward movement limited, whereby said jaw can engage and hold the binding member against backward movement; substantially as described.

5. A clamp comprising a foot-block, means upon said foot-block for engaging and tightening a binding member, a frame pivoted to the foot -block through which the binding member passes before being engaged by the tightening mechanism, land a jaw pivoted upon the face of the frame toward the member for engaging and tightening the binding member, whereby said jaw can engage and hold the binding member against backward movement; substantially as described.

6. Aclamp comprising a foot-block, a screw journaled therein, a head-block having a screw-threaded opening upon said screw, a member for holding one end of a binding member upon said head-block, a hook upon said head-block for engaging another portion of the binding member, a frame upon the footblock, said frame having an opening therethrough, a jaw pivoted upon said frame to move freely toward the head-block, said jaw extending over the opening in the frame, and a binding member secured at one point to the head-block, said member passing through the opening in the foot-block from the side opposite the head-block, and then being engaged by the hook on the'head-block 5 substantially as described.

7. In a clamp or the like a foot-block, a frame pivoted thereto, and a clamping member upon the frame whereby a binding member carried by the foot-block can surround the articles to be bound and then beengaged by the clamping member upon the pivoted frame; substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

CORNELlUS COHALAN.

Witnesses:

CARL F. GULLBERG, Lewis H. STIMsoN.

'KOO

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